I am having issues on takeoff and landing. I get to around 80 knots and suddenly the plane turns to the side. I have tried other planes with the same rudder and brake configuration, but its only happening on the Heinkel. Any ideas what to check and how to remedy for a smooth flight appreciated. Thanks

Hi mootwisematt,
This is normal behavior for taildraggers like the Heinkel. When the tail lifts, engine torque and P-factor cause the aircraft to pull to the side due to asymmetric thrust and gyroscopic forces. Gradual counter rudder input as the tail lifts to keep her straight.  8-)